/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Public/PartyBeaconHost.h
Get all the known players on a given team
number of players on team, 0 if invalid
int32 GetPlayersOnTeam ( int32 TeamIndex, [TArray](API\Runtime\Core\Containers\TArray)< [FUniqueNetIdRepl](API\Runtime\Engine\GameFramework\FUniqueNetIdRepl) > & TeamMembers ) const